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powerpc/mpc5121: Add machine restart support

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Add reset module registers representation and
machine restart callback for mpc5121 platform.

Signed-off-by: Piotr Ziecik <kosmo@semihalf.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Anatolij Gustschin 2010-02-16 10:36:26 -07:00 committed by Grant Likely
parent 284ed66fc3
commit a8dbceb755
5 changed files with 57 additions and 0 deletions
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24
arch/powerpc/include/asm/mpc5121.h Normal file
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@ -0,0 +1,24 @@
/*
* MPC5121 Prototypes and definitions
*
* This file is licensed under the terms of the GNU General Public
* License version 2.
*/
#ifndef __ASM_POWERPC_MPC5121_H__
#define __ASM_POWERPC_MPC5121_H__
/* MPC512x Reset module registers */
struct mpc512x_reset_module {
u32 rcwlr; /* Reset Configuration Word Low Register */
u32 rcwhr; /* Reset Configuration Word High Register */
u32 reserved1;
u32 reserved2;
u32 rsr; /* Reset Status Register */
u32 rmr; /* Reset Mode Register */
u32 rpr; /* Reset Protection Register */
u32 rcr; /* Reset Control Register */
u32 rcer; /* Reset Control Enable Register */
};
#endif /* __ASM_POWERPC_MPC5121_H__ */

1
arch/powerpc/platforms/512x/mpc5121_ads.c
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@ -68,4 +68,5 @@ define_machine(mpc5121_ads) {
.init_IRQ = mpc5121_ads_init_IRQ,
.get_irq = ipic_get_irq,
.calibrate_decr = generic_calibrate_decr,
.restart = mpc512x_restart,
};

1
arch/powerpc/platforms/512x/mpc5121_generic.c
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@ -55,4 +55,5 @@ define_machine(mpc5121_generic) {
.init_IRQ = mpc512x_init_IRQ,
.get_irq = ipic_get_irq,
.calibrate_decr = generic_calibrate_decr,
.restart = mpc512x_restart,
};

1
arch/powerpc/platforms/512x/mpc512x.h
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@ -15,4 +15,5 @@ extern void __init mpc512x_init_IRQ(void);
extern void __init mpc512x_init(void);
extern int __init mpc5121_clk_init(void);
void __init mpc512x_declare_of_platform_devices(void);
extern void mpc512x_restart(char *cmd);
#endif /* __MPC512X_H__ */

30
arch/powerpc/platforms/512x/mpc512x_shared.c
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@ -21,9 +21,38 @@
#include <asm/ipic.h>
#include <asm/prom.h>
#include <asm/time.h>
#include <asm/mpc5121.h>
#include "mpc512x.h"
static struct mpc512x_reset_module __iomem *reset_module_base;
static void __init mpc512x_restart_init(void)
{
struct device_node *np;
np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-reset");
if (!np)
return;
reset_module_base = of_iomap(np, 0);
of_node_put(np);
}
void mpc512x_restart(char *cmd)
{
if (reset_module_base) {
/* Enable software reset "RSTE" */
out_be32(&reset_module_base->rpr, 0x52535445);
/* Set software hard reset */
out_be32(&reset_module_base->rcr, 0x2);
} else {
pr_err("Restart module not mapped.\n");
}
for (;;)
;
}
void __init mpc512x_init_IRQ(void)
{
struct device_node *np;
@ -62,4 +91,5 @@ void __init mpc512x_init(void)
{
mpc512x_declare_of_platform_devices();
mpc5121_clk_init();
mpc512x_restart_init();
}